As mentioned above, 458socomforums has plenty of load data.
For what it's worth, I've had great success with Hornady FTX, and Barnes projectiles over H110. The Barnes performed better out of my 458, but in the end I settled on the Hornadys since they are roughly half the price.
I've got 150 of the FTX to load and 200 Remington 300 gr. JHP's. The guys on .458SOCOM.com have been having great luck with the Remingtons as a economical jacketed bullet. Some are even running Remington 405 gr. JSP's. I found a local source for a 325 gr. gas checked cast bullet for a range load. Now if I could only find time to get them all loaded....well since RRA hasn't shipped my upper, I guess I still have plenty of time! I will be loading with H110 and CCI 350 primers. If your looking for powder and primers.... Atterbury Shooting Complex has loads of both and is even stocking VV powders.
I would be interested in knowing more about your data and distances on your target post. I am trying to get started reloading for my socom. I have had this gun for a year but havent reloaded any ammo yet because sbr ttsx's have been shooting groups like yours at 100 yards. Email me and let know if you would consider sharing some info. Thank you